Shutter-control mechanism for folding cameras



May 5, 1925.

W. F. C. DEVLIN ET AL SHUTTER CONTROL MECHANISM FOR FOLDING CAMERAS 3 Sfieet s-Sheat 1 Filed Dec. 17, 1921 May 5, 1925.

W. F. C. DEVLIN ET AL SHUTTER CONTROL MECHANISM FOR FOLDING CAMERAS Filed Dec. 17, 1921 3 Sheets-Sheet 2 May 5, 1925.

W. F. C. DEVLIN ET AL SHUTTER CONTROL MECHANISM FOR FOLDING CAMERAS Filed Dec. 17, 1921 3 Sheets-Sheet 5 Patented May 5, 1925.

\HILL'IAM FRANCIS CUMXQB DEVLIN AND SIDNEY VALFEB GR-A' ONTARIO, CANADA; sen) GRAHAM AssIeNoR T0 earn DEVLIN.

SHUTTEQEbQONTRO-L MECHANISM FOR FOLDIE'G CA'MEEfi-LS.

Application filed December 17, 1921.

1 0 (11 iii/mm. [1 may concern:

l e it known that we. llHLLIAM FRANCIS (mason Dnvmx and SIDNEY WALKER Gna- "xnu. hoth subjects of the King of Great '"itain. and both residents of the city of tl'ttawa. in the Province of Ontario and Dominion of Canada. have invented certain new and usotnl improvements in Shutte (ontrol lilechaiiiisni l'or Folding Cameras. of which the following); is a specification.

This invention relates to im 'irovenients in shutter control mechanism tor folding camthis and particularly to means of this chara: tcr applicable to cameras of the folding or llapsihle type. in which the shutter is controlled hoth tor instantaneous and time exposures hy an oscillatory lever which usually operated once downwardly for an n antanei'ius exposure to open and shut the shutter. and for time exposure is operated unce to open the shutter and once again to elite-1e, it.

The ooiects ot the invention are to provide ecoimuiical and practical means of thishind which ma he titted to existing types of i oidahle cameras without change in the shutter control mechanism or without entailing alterations in the present construction therewherchv douhle exposures (instani. or time) are guarded against.

'\ it ithcse and other obiects in view. hereisiai'tir more tullv descrihed in detail, the

invention consists essentially in the improred and novel ctnuhination and arransn' ineut of parts disclosed in the accom )anving "tions and drawings in which:

are l a perspective view of an emmeal of the invention.

rare 2 is a side view thereof.

rure I", is a front elevation.

Figure a perspective view of the shutter control mechanism in locked position.

' ire 5 is a longitudinal section.

i are (S a longitudinal section of the in ter control mechanism unlocked.

'ure 7 is a perspective detail of the r v latch detached.

ldii'lll e t is a similar detail of the second- :rv latrh. detached.

"'ure 8) is a perspective detailed view of ate and crank rod.

' perspiwtive view of the in- Ll troia a camera.

Serial No. 523,112.

l igrure iii is sextional detail of the inner rocker plate with under arm deprsssirg spring and oi'ieratinnrod.

Figure 14. is a longitiulinsil section of the winding mechanism.

In the drawings. lllit characters oi": ref ence indicate corres;)onding nuts in all tirfigures.

Referring to the drawings:

indicates a folding or collapsih c cane era of any we l known standard type an! construction. divided tor the purpo es of this specification into two pains or sepiirias. B comprising the hodv or film windingr and t. the toldahle and collapsi. .1 put The means hereinafter descrihed. as ahead; m=' ntione-:l. are i to he appl ed i existing came as without material alteration of the present shutter control lever; and which is herein shown and described as an plied to a folding camera with nee structural alterations and llll')tllll('2llIlUll-. equally adapted to hex or other types oi camera.

l) is the os 1illatorv lever desie i'ied in he tvpe of camera herein selected to control shutter nie hanisin. which not a part of' the present invention and is. therefore. not descril ed in detail. The movement ol' the lever B in this type oi camera once down wardlv operates the shutter. openin and closing it tor instantaneous exposures. while for time exposures the lever is operated twice downwardlv. ll ith the present in vention. however. latch mechanism con trolled hy the film winding device provided wherein the operation oi the o l tory lever I) prevented until the rim winding! mechanism has heen operated tr. wind the lihn alreadv used and to replace it by a new one. thus preventing; two exposures-z on the same film.

This shutter control mechanisu'i coiuprii-ies a primarv latch lever 10 pivoted on a pin it in a slotted plate l2 suitahlv mounted on t front 13 ot the extendin or collapsihle v tion 14- of the camera. This latch lerei is provided with sprin -actuated meg: arranged in a (ill-(fill: at the hack oi the ted plate 12.. adapted in norauil 1;?tlilx,lposition to move the latch outnardlv in ensingle :at its upper end with the lever l th h latching; it -i\ -3 z\ll.f-t nunrement.

it; is the s 'v'il l wpr rirawd ilrh lever formed in J 's-nape to euihrace the plate iii) til

L2 adjacent to the top and to fit into a suitable notch 17 in the sides thereof. 18 are resilient means for this secondary latch lever whereby, on the film winding mechanism being operated, this lever on being released moves upwardly out of the notch 17 at the same time as the primary latch is moved to a retracted position between the sides of the plate 12. being retained in such position by the secondary latch lever until released by movement of the lever D.

The disengaging or releasing of the pri mary latch lever 10 is directly brought about by means of a rod 19 mounted on the front of the camera at 20 below the lens with freedom to rotate. and having one end upwardly and outward y cXtending to form a crank member 21 adapted to opcrativcly engage the lower end of the primary latch lever 10, the opposite end of the rod 19 being designed to form a crank 24.

The operation of the shutter control mechanism in so far as it has been described, is as follows: The film winding device having been operated, the crank 24 is in turn slidably engaged to move upwardly. causing the crank 21 through the lever or red 19 to move in the opposite direction outwardly. bringing with it the lower end of the pri mary latch 10, the upper end of said latch being at the same time moved to a retracted position inwardly to release the secondary latch 16 and the lever I), whereby the latter is free to move downwardly until it contacts with the secondary latch 16 to move it back into released position in the notch 17, the primary latch 10 at the same time again engaging in locking position with the lever D.

The crank 24' is adapted to engage with a longitudinally extending: rocker plate 25 mounted on the inside of the camera door 26 at 27 and 23 in notches to prevent lateral movement. This rocker plate 25 is provided with a suitable link plate 29 at its inner end and slidably connected thereby and by means of the link 30 is adapted to slide therein with a rocker plate 31 pivotally mounted in the bottom of the film winding portion of the camera.

32 is a bearing plate on the rocker 31 adapted to engage the other end of the link 30. The link 30 extends across the hinge of the camera door and designed and is formed with a slot 33 to allow the crank 24 to pass the hinge without being raised or actuated. The rocker 31 is provided with a spring under arm 3% adapted to keep the rockers 3i and 9,3 depressed. 35 is the curved inner end of the rocker 31 designed to engage with a rod 36. adapted at its other end to be engaged and niir ad by the film winding device 37 comprising a winding; shaft 38, ra n ring: 39 extending around the shaft 38 and ecceutrically mounted thereon at l0, and

spring held in normal position by the spring means 41. 42 is the winding member connected to the cam ring 39 whereby, on being wound anticlockwise, the ring 39 will be moved eccentrically to move the rod 36 43 is a suitable covering plate adapted to lie against the spring 41. 44 is the usual operating PI'GQSHIQ bulb for the shutter control lever D From the foregoing, the complete operation of our invention, will be readily understood and appreciated and is as follows: The film roll having been secured in place on the winding device, the shutter lever T) will be, for operative purposes, locked or latched, in that it cannot move downwardly to open the shutter by reason of the fact that it is latched on the primary latch lever 10. To change the lever 10 from this position and to enable the shutter to be operated for either an instantaneous or a time exposure, the film winding device is now turned in an anti-clockwise direction. when it will engage eceentrically with the rod 36, giving it a downward movement to bear on the rocker plate 31 which. in turn, conveys the movement through the link 30 to the other rocker plate 25. having slidable. releasable connection with the crank 24. The movement thus conveyed causes the crank 24 to move up wardly which, in turn, through the rod or lever 19, operates the crank 21 to operate the primary latch 10 connected thereto at the bottom by moving same outwardly and. by means of the pivot 11, inwardly at the top. thereby releasing the contact of the latch 10 with the lever D, and allowing the same lever D to operate the shutter while at the same time releasing the secondary latch lever 16 and allowing it to spring upwardly. as already described. until released. by movement of the lever D. Simultaneously with the contact of the l ver D in its downward movement with the secondary latch 16. the primary latch 10 is released from its re tracted position to again engage with the lever D in locked position.

It will be seen that a camera equipped with our attachment will be practically proof against double exposure on a rolled film. After an exposure it is necessary to give the winding roll a turn so that the exposure mechanism may be operated. In doing this. an operators attention is directed to the fact that the winding is necessary. Therefore, be naturally winds the film the proper amount as indicated on the back of the film through the back of the camera.

Our device operates as well for a time exposure as for an instantaneous exposure. \Vhen a time exposure is being made, the operatinglever D on the first upper stroke does not come quite to its highest position, and therefore holds the latch 10 in its inward position as shown in Figure 6. The lever D l lO is operated in the ordii'iary manner either by hand or by bulb. and it is not necessary for the person using the camera to pay any attention to the locking device, and after the time exposure. the latch automatically locks the lever in the same manner as for an instantaneous picture.

As many changes could be made in the above construction and many apparently widely dillcrent embodiments of our invention within the scope of the claims. constructed without departing from the spirit or scope thereof, it is intended that all matter coi'itainedin the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

hat we claim our invention is:

l. A t'oldirn; camera comprising a tilm containing part. a film winding device thcrcin. a folding and an (attending part. shutter control mechanism on the extending part, means for preventing operation of the shuttcr control mechanism until attcr the tilm. winding device has been. operated including a longitudinally movable rod operated by the film Winding device. a rocker operativelv connected to thc rod. a link connected to the rocker. a second rocker on the folding part having slidablc engagement with the link. and means for operativelv connecting the second rocker with the shutter control mechanism.

2. In a camera. lilm winding device. shuttcr control mechanism. a longitudinally movable rod operated by the film winding device, a pivoted roclrer operated by the rod a second pivoted rocker. a link connecting the lirstancntioncd pivoted rocker with the sccond pivoted rocker. a cranl; member having engagement with the second rocker. and means operated b the crank tor preventing operation of the shutter mechanism until a t'ter tae film winding incchani-a'a has been operated.

3. In a camera. a film winding device. shutter control mechinfsm. a longitudinally movable rod operated by the film winding device. a pivoted rocker operated b v the rod, a second pivoted rocker. a li d; connecting the first-mentioned pivoted rocker with the second pivoted rocker. the said link having slidable engagement with the second rocl-Icr. a crank member having cng ..gcmcnt with the second IOtlfll. and means operated by the crank for preventingoperation of the hutter mechanism until afte the fi m winding mechanism has been operated.

.l. foidingcamcra co nprising a film containing part. shutter mechanism. a folding part carrying the shutter mechan m adapted to collapse into the film contain ng part. a hinged door. a film \illltllllijf device. means tor preventing operation oi the shutter mechanism until after the film winding device has been operated comprising' a latch device having a releasing lever. an operating part on the door adapted to engage the releasinglever, an operating part on the film containing )nrt adapted when the folding part is folded to engage the release le\ er. and means for operativelv connecting, the two operative parts. the said means comprising a link pivot'ed to one part having slidable and pivotal engagement with the other part.

A folding camera comprising a film containing part. shutter mechanism. an extending part carrying the shutter mechanism adapted to collapse into the film containing part, a hinged door. a film winding device. and means for preventing operation of the shutter mechanism until atter the film winding device has been operated comprising a rocker on the film containing pa rt operated by the film winding device. a rocker on the door opercdivcl connected to the first-mew tioncd rocker and adapted to be moved thereby. and a latch device connected to the shutter mechanism having releasing means adapted to be engaged by the rocker on the door.

6. A. folding camera cominising a film containing part. shutter mechanism. a fold ing part carrying the shutter mechanism adapted to collapse into the film containing part. a hinged door. a film winding device. and means for preventing operation of the shutter mechanism until at'ter the film wind ing device has been operated comprising a rocker on the film containing part operated by the tilm wimling device. a rocker in the door opcrativcly connected to the first-mentioncd roclzcr and adapted to be moved thereby. and a latch device connected to the shutter control device having releas ng means adapted to be engaged by the rocker on the door. and having sliding engagement therewith. being adapted to disengage thcrc irom when the folding part is folded and being adapted when in folded posit on to be engaged bv the rocker on the film containing part.

7. in a camera. shutter control mechanism having a dcpi sible rmcrating lever. a piv otcd latch demcc adapted normally to prevent operation of the lever. a film winding device. means opcratcz'l bf. the film winding device for n'io'iinr-f the latch to ri' tractcd position. and a second latch device spring-aw tuated and adapted to retain the firstancntioncd latch device in rctractisl position. the second latch device being adapted to be engagcd by the shutter control lever during it movement. and mo vcd to a positicn which will release the firstanentioncd latch device.

9. In a camera. shutter control mechanism and a shutter control lover. a pivoted springactuatcd latch r crice normally preventing operation oi the ever having a notch therein. means for moving the latch lcrcr to re tracted position, a secondary latch lcvcrhavlot) lit)

lit)

ing means to extend into the notch in the first latch lever, the said means when in the said notch permitting the first latch lever to spring to engaged position, the said secondary latch lever being adapted to be engaged and moved to disengaged position by the shutter control lever.

9. In a camera, shutter control mechanism including an operating lever, primarv latch device adapted to engage and normally prevent operation of the lever. a secondary latch device adapted in engaged position to pre vent operation of the primary latch device and being releasable by movement of the shutter control lever. a crank adapted to move the primary latch device to retracted position. tilm winding; lllellltlnlhll'l. and means for operatively connecting the lilm Winding mechanism with the crank.

10. In a amera, shattrn' control lllttllir nism including an operating lever, primary latch device adapted to engage and normally prevent operation of the lever, a secondary latch device adapted in cng ed position to prevent operation of the pi :narv latch device and being: releasable by n'ioveinent ot the shutter control lever, a crank adapted to move the primary latch device to retracted position. film winding mechanism, and means for operatively connecting" the .lilm \llltllllg mechanism with the crank, the said means including a pivoted rocker having releasable. engagement with the. end of the crank.

11. In a camera, shutter control mechanism including an operating lever, primary latch device adapted to engage and normally prevent operation of the lever, 21 secondary latch device adapted in engaged position to prevent. operation at the primary latch device and bein; releasable by movement of shutter control lever, a crank adapted to move the primary latch device to retracted position. tilin Winding mechanism, and means for ope tivelv connecting: the film Winding met-la sin With the crank. the said means incl nling a pivoted rocker plate having releasable en nent with the end of the crank, a second rocker, and a link connecting the two rockers.

12. In a camera. shutter control mechanism including an operating lever, a primary latca device adapted to engage and normally prevent operation of the lover, a se ondary latch device adapted in engaged position to n'evont operation 01? the prinrn-y latch devi and being releasable by movement of the shutter control lover, a crank adaped to move the primarv latch device to retracted position. film Winding; mechan sm, and means for opeiativeli connecting; the iilm winding mechanism \vith the crank. the said means inchnlin pivoted rocker plates having" releasa le cu lenient will the end of the c'ank, a second rocker, and a link connecting the two rockers, one end of the link ha inc; sliding as Well as pivotal engagement.

13. In a camera, afilm Winding: device including a Winding shaft, a cam ring extending about the Winding shaft and mounted thereon with limited freedom of movement to and from the axis of the shaft being; sprin eln ld in normal position. a winding member connected to the ring adapted when turned in one direction to cause the ring to move eccentrically. a rod adapted to be engagged and moved by a portion of the ring: when moverx eccentrically. and shutter control mechanism controlled from the rod.

ll. 1. folding camera comprising at him coin ainizn: part. a tilni vinding device there-- in. a folding)? part, shutter control mechani.-;m on the folding part, means for preventing op ration ot the shutter control mechanism until after the tilm vinding' device has been operated including a longitndinally movable rod opn'ated by the film Winding device. a rocker operatively connected to the rod. a link connected to the rocker, a second rocket on the folding part having slidable engage ment with the link, and means for operative iv coinieetine either the first or second roclaer with the shutter control mechanism.

iii. In a camera, film winding device. shutter control mechanism, a longitiulinall}. movahle rod operated by the film Winding); device, a pivoted rocker operated by the rod. a seond pivoted roclter, a link connecting the first-mentioned pivoted 'osker with the second pivoted rocker. a crank member having engagement with either the lirst nentioned rocker or the second rocker. and means ope 'ated by the crank for preventing operaa nc; of the shutter mechanism until atter the iilin winding mechanism has been operated.

16. In a camera, a film Winding device. shutter control mechanism, a longitudinally movable rod ope "ated by the film \vindii e' device, a pivoted rock r operated by the rod. a second pivoted rocker, a. link connecting the first-mentioned pivoted rocker with the second pivoted rocher, the said link havinzr slidahle ei'igag'emcnt with the second rocker, a crank member having engagement with the first-mentioned rocker or the second rocker, and means operated by the crank for preventing); operation of the shutter mechanism until alter the tilm winding mcchnni n. ha been operated.

1?. ln :1 camera. shutter control mechanism including an operating: lever. primary latch device adapted to engage and normally pr vent operation of the lever. a secondary lalcl device adapted in engaged position to we vent operation of the primarv latch device and being releasable by movement of the shutter control lever, a c'ank adapted to move the primary latch device to retracted ill) poeition. tilm winding mechaniem. and means tor operativelv connecting the film winding mechanism with the crank, the said ineana including a pivoted rocker plate having slid ahle engagement with the end of the crank.

W. In a *amera. Shutter control meehan am including an operating lever. primal" latch device adapted to engage and normally prevent operation of the lever, a eeeondar latch device adapted in engaged position to prevent operation of the primary latch device and heingr releasable by movement of the ehntter control lever. a crank adapted to more the primary latch device to retracted pmition. tilm winding mechanism. and meana tor opcratii'ely connecting the lilm winding: mechanism with the crank. the said means including a rocker plate ha Yin; elidahle engagement with the end of the crank, a second roeker and a link connecting the two rockers.

19. la a camera. shutter control mecle anism including an operating lever. prim- (ll' latch device adapted to engage and normally prevent operation of the lever a secondary latch device adapted in engaged po- Sition to prevent operation of the primary latch device and being; releasahle hy move ment ot' the shutter control leven a crank adapted to more the primary latch device to retracted poeitiom film windingmechanism. and means for operatively connecting the tilm winding mechanism with the crank. the said means including a rm'ker plate having: slidahle em aglement with the end of the crank a my ond rockeiz and a link connecting the two rocker spring: means; hencath one oi said rockere wherehy holh rockere are kept depreeaed.

In witness whereof we have hereunto set our hands in the presence ot a witness.

WlLLlAM FRANCIS CUMNOR DEVLIN. SlDNEY WALKER GRAHAM. itnees:

llieaiciil. ll. SMART. 

